For Houston water, choose a shower filter by the disinfectant your utility uses, chlorine or chloramine, since no shower filter changes hardness.
- Your utility's annual water quality report names its disinfectant (US EPA).
- More than one in five Americans drink water treated with chloramine (US EPA). NSF/ANSI 177 covers free chlorine only (NSF).
- Hardness is calcium and magnesium, and that takes a water softener (USGS).
Our pick: The Second Showerhead ($99, or $79 with a filter subscription) covers either disinfectant: its Vitamin C core reduced free chlorine and chloramine by 99.9% in independent lab testing, held through Day 1-60 in our own testing.
- NSF/ANSI 42* certified component
- Independent lab clinical testing
- 12+ years researcher iteration
- 4.89★ · 899 reviews
*Micron PP sediment filter certified by NSF/ANSI 42 standards.
Vitamin C wall-mount filter — 99.9% chlorine and chloramine reduction during the cartridge's peak performance window (Day 1–60). $79 on subscription, a new filter every 60 days, NSF/ANSI 42* certified PP sediment pre-filter.
Shop the Second ShowerheadRelated Reading
FAQ
Do shower filters actually help with skin and hair?
Yes. Filtering chlorine and chloramines from shower water can reduce dryness, irritation, and damage to both skin and hair.
How often should I replace a shower filter?
We recommend a new Second Shower filter every 60 days on the Showerhead and every 30 days on the Showerhand, or sooner if the filter looks deep brown or black or the water pressure drops noticeably.
Can I install a shower filter in a rental apartment?
Yes. Second Shower is renter-friendly: it installs in about a minute with no tools and no permanent plumbing changes.
What makes Second Shower different from other filters?
Second Shower uses NSF-certified Vitamin C filtration that removes 99.9% (during the cartridge's peak performance window, Day 1–60) of chlorine while maintaining water pressure — engineered in Seoul for performance and design.
